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Fabrication of Fe3O4/ZnO magnetite core shell and its application in photocatalysis using sunlight.

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Title: Fabrication of Fe3O4/ZnO magnetite core shell and its application in photocatalysis using sunlight.
Authors: Atla, Shashi B.1, Lin, Wun-Rong2, Chien, Ting-Che1, Tseng, Min-Jen3, Shu, Jwu-Ching4, Chen, Chien-Cheng5, Chen, Chien-Yen1,6 yen@eq.ccu.edu.tw
Source: Materials Chemistry & Physics. Sep2018, Vol. 216, p380-386. 7p.
Subjects: Magnetite, Photocatalysis, Methylene blue, Irradiation, Nanocomposite materials
Abstract: Three chore-shell magnetite ZnO catalysts (Fe 3 O 4 /ZnO: M1, Fe 3 O 4 /SiO 2 /ZnO: M2, Fe 3 O 4 /SiO 2 -APTS/ZnO: M3) were prepared, characterized and tested for their photocatalysis in the degradation of methylene blue (MB) dye under sunlight irradiation. M2 and M3 catalysts exhibited better kinetics and higher activity. The silica coating of Fe 3 O 4 in M2 and M3 catalysts enhanced efficient transport of MB dye to the ZnO site and thus enhanced photocatalysis. Photocatalytic reactivity was also related to the defects present in the samples under the synthesized conditions. Photoluminescence studies indicated the order of the defects in ZnO catalyst as M2>M3>M1. The presence of ZnO defects in the samples (M2 & M3) slowed electron recombination time, enhanced hydroxyl radical formation and hence performed faster degradation of MB. The significant enhancement in photoactivity could be attributed to the synergistic effect of adsorption by silica and ZnO catalysis. The recycle experiments using external magnetic showed the remained activity which demonstrated the stable and efficient magnetic separable catalysts. [ABSTRACT FROM AUTHOR]
Copyright of Materials Chemistry & Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 130949724
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Fabrication of Fe3O4/ZnO magnetite core shell and its application in photocatalysis using sunlight.
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  Data: <searchLink fieldCode="AR" term="%22Atla%2C+Shashi+B%2E%22">Atla, Shashi B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lin%2C+Wun-Rong%22">Lin, Wun-Rong</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Chien%2C+Ting-Che%22">Chien, Ting-Che</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tseng%2C+Min-Jen%22">Tseng, Min-Jen</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Shu%2C+Jwu-Ching%22">Shu, Jwu-Ching</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chien-Cheng%22">Chen, Chien-Cheng</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chien-Yen%22">Chen, Chien-Yen</searchLink><relatesTo>1,6</relatesTo><i> yen@eq.ccu.edu.tw</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+Chemistry+%26+Physics%22">Materials Chemistry & Physics</searchLink>. Sep2018, Vol. 216, p380-386. 7p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Magnetite%22">Magnetite</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysis%22">Photocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Methylene+blue%22">Methylene blue</searchLink><br /><searchLink fieldCode="DE" term="%22Irradiation%22">Irradiation</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink>
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  Data: Three chore-shell magnetite ZnO catalysts (Fe 3 O 4 /ZnO: M1, Fe 3 O 4 /SiO 2 /ZnO: M2, Fe 3 O 4 /SiO 2 -APTS/ZnO: M3) were prepared, characterized and tested for their photocatalysis in the degradation of methylene blue (MB) dye under sunlight irradiation. M2 and M3 catalysts exhibited better kinetics and higher activity. The silica coating of Fe 3 O 4 in M2 and M3 catalysts enhanced efficient transport of MB dye to the ZnO site and thus enhanced photocatalysis. Photocatalytic reactivity was also related to the defects present in the samples under the synthesized conditions. Photoluminescence studies indicated the order of the defects in ZnO catalyst as M2>M3>M1. The presence of ZnO defects in the samples (M2 & M3) slowed electron recombination time, enhanced hydroxyl radical formation and hence performed faster degradation of MB. The significant enhancement in photoactivity could be attributed to the synergistic effect of adsorption by silica and ZnO catalysis. The recycle experiments using external magnetic showed the remained activity which demonstrated the stable and efficient magnetic separable catalysts. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Chemistry & Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.matchemphys.2018.06.020
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 7
        StartPage: 380
    Subjects:
      – SubjectFull: Magnetite
        Type: general
      – SubjectFull: Photocatalysis
        Type: general
      – SubjectFull: Methylene blue
        Type: general
      – SubjectFull: Irradiation
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      – SubjectFull: Nanocomposite materials
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      – TitleFull: Fabrication of Fe3O4/ZnO magnetite core shell and its application in photocatalysis using sunlight.
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            NameFull: Atla, Shashi B.
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            NameFull: Lin, Wun-Rong
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            NameFull: Chien, Ting-Che
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            NameFull: Tseng, Min-Jen
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            NameFull: Shu, Jwu-Ching
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            NameFull: Chen, Chien-Cheng
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            – D: 01
              M: 09
              Text: Sep2018
              Type: published
              Y: 2018
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              Value: 216
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            – TitleFull: Materials Chemistry & Physics
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